Electric iron.



W. JUNIPER.

ELECTRIC IRON. I ATION FILED OCT. 30. 191

- Patented Oct. 31, 1916.

'WI'I'T JUNIYEB, OF LER'WYN, ILLINOIS, ASSIGNOB, BY. DIRECT MENTS, TO GI'IS ELECTRICAL COMPANY,

narrow ori rumors.

To all whom it may concern:

Be, it known that I, WITT JUNIPER, a citizen of the United States, residing at Berwyn, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Electric Irons, of which the followmg 1s a specification, reference beingv' had to the accompanying drawings. I

My invention relates to electric irons and it has for its principal object the provision of a new and improved form and arrangement of parts by reason of which the iron can readily be taken apart and again properly assembled by any ordinary user of the iron of very little or' no mechanical skill, and by the useof a very limited tool equip-.

ment.

To this end it is one of the objects of my invention to provide contacts or binding posts for theheat unit of the iron arranged. in such away that they offer no obstacle to the free separation of the parts of the iron.

It is another-objectof my invention to provide for the proper protection of the heat unit such that the unit can be taken'from the iron and sent through the mails for repair without undue danger of injury to the unit, the arrangement of the protecting parts being such that the proper directing of the heat-to the sole of the iron'is not interfered' with. I

It is another object of my invention to provide a construction in which a maximum protection is afiorded guarding against the escape of the heat through the upper part of the iron'away from the sole. L

It is .another object of'my invention to improve devices of this type in sundry .details hereinafter pointed out.

The preferred means by which I have ac complished my several objects are illustrated in the accompanying drawings and are here- I are secured 1n .pos1t1on on the upper and "lower faces of the plate 19 with the wire 20 wound thereon. As will be readily underinafter specifically described. That which I believe to be new is set forth in the claims.- In the drawings, Figure'l is a side view of an iron embodying my improved construction; Fig. 2 is a transverse vertical section through the body of the iron, being taken substantially on line 2-2 9f Fig. 1'; Fig. 3' is a longitudinal vertical section through the center of the body of the iron, being taken substantially on line 3-3 of Fig. 2; Fig. 4 is a top-plan view of the heat unit of my iron; Fig. 5 is a vertical cross- Y nnncrnrc mom.

Specification of Letters 2mm.

0F FRANKLINPARK; ILLINOIS, A CORPO- hase Oct. 1916.

Application filed October a0, 1915. Serial m5. 58,792.

section. through the heat unit, being taken substantially on line 5-5 .of Fig. 4; and; Figs. 6 and 7 are detailedviews showing the elements of the connections between the binding postsand the-heat unit. I, r

.Referrlng to the several figures of the drawings in which corres ond-mg parts are indicated bythe same re erence characters, v

10 indicates the top or shell of. the iron secured by means of screws 11 to the sole 12 of the iron, the shell 10 being in contact with .the sole only at its lower edges, as shown in Figs. 2an'd 3.. A handle 13 is secured upon the top or shell 10 by means-of the screws 11, washers 14. being interposed beam) mnsm: Lesion;

tween the top 10 and the strap 15 of the handle 13 for insulating the handle from the ody of the iron. I

The heat un1t'16 of theiron rests upon the 1 sole 12, being held in position thereon by a pressure-plate 17 which is secured upon the sole 12 by means ofa screw 18. The pressure-plate 17 serves to press the flexible heat unit. 16 firmly down uponthe sole 12 and also serves for storing heat within the body of;the iron. As is best shown in Figs. 2 and 3, 'the' pressure-plate 17 is separated by an air space on all sides from the top or shell 10 of the iron so as to preventvery largely the escape of heat from the pressure-plate 17 t0 the shell 10. The pressure-plate 17 is preferably in the form of a'casting having the-scale removed from the bottom face only, the scale remaining on the upper and outer faces of the plate, being of assistance in retaining the heat in the plate.

The heat unit 16 comprises a plate 19 havinga considerable-length of resistance wire In the construction 2O wound thereon. shown, the resistance wire 20 is madein the form of a narrow fiat strip, being formed of any suitable material. Plates 21 and 22 stood, the plates 19, 21 and 22 are to be formed of a suitable insulating material,

being preferably plates of mica. For the protection ,of the mica plates of the heat unit when suchunit is to be taken out of heat "from the unit to the sole 12 will be favored, while the plate 23 is to be made of iron or some other metal which is a comparatively poorer conductor of heat than brass. In the construction shown, the plates 2324 are bound together by tongues 25 cut from the plate 24 extending through suitable slots 26 in the plate 23. At the ends of the unit the plate 24 is turned about the end of the plate '23, as best shown in Figs. 3 and 4. i

The ends of the wire 20 are connected to contacts 27 .and 28, respectively, which are fixed upon the unit 16 in any suitable manner. The binding posts 29 by. which the heat unit is adapted to be connected with any suitable source of electrical energy are fixedly mounted upon. the shell 10 directly over the contacts 2728. as best shown in Fig. 3, such binding posts being insulated by means of mica or in any other suitable manner from the shell 10. Fixed upon the lower end of each of the two binding posts 29, preferably by means of a nut on the lower end of the binding post, is an arm 30 provided at its lower end with a flattened sleeve or housing 31 adapted to slip readily over the upwardly-extending end of one of the contacts 2728. By this means the binding posts 29 are suitably connected. with the ends-of the resistance wire 20. At the same time upon the removal of the screws 11 the top or shell 10 of the iron with the binding posts ,29 mounted thereon is adapted to be lifted freely out of contact with the sole 12 without the loosening of any part or parts. Upon the subsequent removal of the screw 18, the unit 16 is freed from the sole 12 and is in condition for carriage by mailv or otherwise without undue danger of damage to the mica plates 19, 21 and 22. As-is best shown in Fig. 3, the plate 23 is turned upward at one end for supporting a plate of mica 32. between the pressure-plate 17 and the contacts 27-28 for securing theproper insulation between such parts.

The sole 12 is preferably nickeled upon its entire surface except the upper face with whichthebrass plate 24 is brought'in contact. This upper face of the sole 12 is preferably free of nickel which is a comparatively poor conductor of heat. In case the sole 12 is cast out of iron, the upper face is preferably machine finished for the removal of the scale so as'to facilitate the passage of the heat from the unit 16 into the sole.

The sole 12 and the shell 1 0 are preferably pointed at both ends to conform to the shape of the heat unit 16 as shown in Fig.

4, although I do not wish to be restricted to this form except as hereinafter specifically claimed.

By the use of a plate 23 of comparatively poor heat-conducting qualities on one face of my heat unit and the use of a plate 24 of comparatively much better heat-conducting qualities on the other face, I have provided a construction by which the heat produced is directed largely toward such plate 24. So far as I'am aware, I am the first to produce a heat unit of thls type,'and. my

claims are to be construed accordingly.

What I claim asmy invention and desire to secure by Letters Patent, is

1. An electric. heating unit comprising in combination an electric circuit member ofresistance material, a brass protecting-plate insulated from said resistance member on one face thereof, and an iron protectingplate insulated from said resistance member on'its opposite face.

2. An electric heating unit comprising an electric circuit member of resistance material, metal face-plates secured on opposite sidesof said electric circuit member, and insulating means between said circuit member heat conductivity than that of the metal forming the other face-plate.

'4. An electric heating unit comprising a sheet of mica, a resistance coil wound thereon, sheets of mica on opposite faces of the resistance coil, and metal face-plates secured on opposite faces of said secondnamed sheets of mica respectively, said metal face-plates being held rigidly in posi- -ti'on relative to each other by tongues formed with one ofsaid face-plates extending through openings through said sheets of mica into engagement with suitable openings in the other face-plate.

WITT. JUNIPER. 

